> ## Documentation Index > Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt > Use this file to discover all available pages before exploring further. # Verify a CID set against BACEN > Sends the participant's sync verifier (the XOR of its active CIDs of one key type) to BACEN's createSyncVerification and returns BACEN's OK/NOK verdict verbatim. NOK means the CID sets diverge; resolve it with the CID set file and GET cids/entries/{cid}. The participant comes from X-ISPB. ## OpenAPI ````yaml /pt/openapi/v3-current/spi-dict.yaml post /api/v1/dict/sync-verifications openapi: 3.1.0 info: contact: email: contact@lerian.studio name: Lerian Studio url: https://lerian.studio description: >- OpenAPI 3.1 surface for the DICT (Diretório de Identificadores de Contas Transacionais) capability of Lerian SPI, the direct integration between the institution and the Brazilian Instant Payment System (SPI/Pix). It covers the PIX key lifecycle, portability and ownership claims, the MED 2.0 dispute surface (infraction reports, refunds, fraud markers, and funds recoveries), antifraud statistics, synchronous DICT reports, and the internal operations that keep the key directory consistent. license: name: Lerian Studio General License title: Lerian SPI — DICT API version: 1.0.0 servers: - url: https://api.example.com description: >- Replace the example host with the URL provided during environment onboarding. security: [] tags: - description: 'PIX key lifecycle: register, list, search, lookup, delete, and statistics.' name: Keys - description: >- PIX key portability and ownership claims through their full lifecycle (initiate, confirm, reject, cancel, acknowledge, complete). name: Claims - description: 'DICT infraction reports: list and retrieve.' name: Infractions - description: 'DICT refund requests: create, list, and retrieve.' name: Refunds - description: 'PIX fraud markers: create, list, and statistics.' name: Fraud Markers - description: >- Durable MED operation-intent status: the operationId every create/lifecycle-transition backlog route returns or references on every outcome, queryable independently of the business resource. name: Operations - description: >- Synchronous reports over Lerian SPI's own DICT record: COUNT(*) summaries of keys (by type/status) and claims (by type/status + open-past-deadline). COUNT-only — DICT holds no money. name: Reports - description: 'Internal DICT operations: claim deadline processing.' name: Internal - description: >- DICT synchronism checks transported to BACEN for the participant named in X-ISPB: sync verification, CID resolution and CID set events, projected verbatim. name: VSync paths: /api/v1/dict/sync-verifications: post: tags: - VSync summary: Verify a CID set against BACEN description: >- Sends the participant's sync verifier (the XOR of its active CIDs of one key type) to BACEN's createSyncVerification and returns BACEN's OK/NOK verdict verbatim. NOK means the CID sets diverge; resolve it with the CID set file and GET cids/entries/{cid}. The participant comes from X-ISPB. operationId: createDICTSyncVerification parameters: - description: Required key used to prevent replaying the mutation. in: header name: X-Idempotency required: true schema: description: Required key used to prevent replaying the mutation. type: string - description: >- ISPB of the participant the call acts for. It must be this deployment's direct participant or an indirect it sponsors; the body never carries it. in: header name: X-ISPB required: true schema: description: >- ISPB of the participant the call acts for. It must be this deployment's direct participant or an indirect it sponsors; the body never carries it. examples: - '12345678' pattern: ^[0-9A-Z]{8}$ type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/CreateSyncVerificationRequest' required: true responses: '201': content: application/json: schema: $ref: '#/components/schemas/SyncVerificationResponse' description: Created '403': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Forbidden '422': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unprocessable Entity '429': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Too Many Requests '500': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Internal Server Error '503': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Service Unavailable default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: CreateSyncVerificationRequest: additionalProperties: false properties: keyType: description: Key type whose CID set is verified. enum: - CPF - CNPJ - EMAIL - PHONE - EVP examples: - CPF type: string participantSyncVerifier: description: >- The participant's own sync verifier: the XOR of every active CID of this key type, 64 hex characters. examples: - e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 pattern: ^[0-9a-fA-F]{64}$ type: string required: - keyType - participantSyncVerifier type: object SyncVerificationResponse: additionalProperties: false properties: bacen: $ref: '#/components/schemas/BACENEnvelopeResponse' description: >- BACEN's operational envelope for this call; omitted when BACEN sent no correlation id. id: description: BACEN's own id for this sync verification. examples: - '4521' type: string keyType: description: Key type that was verified. examples: - CPF type: string participant: description: ISPB the verification was run for, resolved from X-ISPB. examples: - '12345678' type: string participantSyncVerifier: description: The sync verifier that was sent to BACEN. examples: - e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 type: string result: description: >- BACEN's verdict, verbatim: OK when the CID sets match, NOK when they diverge. examples: - NOK type: string required: - participant - keyType - participantSyncVerifier - id - result type: object Detail: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). type: string correlationId: description: Request-scoped correlation identifier echoing X-Request-ID. examples: - req-7a3f9c2e type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string upstream: $ref: '#/components/schemas/Upstream' description: >- RFC 9457 extension member: the error a proxied third-party provider reported. Absent unless the emitting service explicitly surfaced one. required: - correlationId type: object BACENEnvelopeResponse: additionalProperties: false properties: correlationId: description: >- BACEN's own correlation identifier for its most recent interaction on this record — the wire value, distinct from any request-scoped echo. examples: - a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4 type: string lastModified: description: >- BACEN's own LastModified for this resource (RFC 3339, UTC) — the version this response reflects; present only on the MED resources (infraction, refund, fraud marker, funds recovery). examples: - '2026-06-14T12:00:00Z' type: string responseTime: description: >- Instant BACEN answered its most recent interaction on this record, RFC 3339 (UTC); omitted when BACEN's response carried no parseable instant. examples: - '2026-06-14T12:00:00Z' type: string required: - correlationId type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object Upstream: additionalProperties: false properties: code: description: The upstream provider's own error code, verbatim. examples: - E4001 type: string message: description: >- The upstream provider's own error message, verbatim (bounded, never its raw response body). examples: - account not found at provider type: string type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.